Definición de pit prop en inglés:
A large wooden beam used to support the roof of a coal mine.
- It features pit props for roof beams, bricks from wash houses, a massive lump of coal for an alter and a half winding wheel on a wall.
- The use of wood in the foundries and for pit props in the mines must have been considerable.
- Its cargo of pit props - used to hold up mine shafts - went into the sea and its crew overboard.
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